window.setInterval(function() {
 $(".markproduct_info").hide();
	var num = $(".markproduct_info").length;
	$($(".markproduct_info")[randomXToY(0, num - 1)]).show();
}, 2000);

//function to get random number upto m
function randomXToY(minVal,maxVal,floatVal)
{
  var randVal = minVal+(Math.random()*(maxVal-minVal));
  return typeof floatVal=='undefined'?Math.round(randVal):randVal.toFixed(floatVal);
}
$(function() { $(".lavaLamp").lavaLamp({ fx: "backout", speed: 700 })});